Question

Can anyone help me with the query ?

I’ve tried the following but it comes up with an error

SELECT Column1, Column2, Column3 FROM Table WHERE [Column1] NOT IN 
(SELECT [Column1] FROM Table GROUP BY [Column1] HAVING COUNT([Column]) > 1)

Invalid MEMO, OLE, or Hyperlink Object in subquery [Column1].

Answer 1

Use Group By with Having clause:

SELECT Column1, MIN(Column2)AS Column2, MIN(Column3)AS Column3
FROM dbo.Table
GROUP BY Column1
HAVING ( COUNT(Column1) = 1 )

Should work since there’s only one row per “group”.